Creep jack



Jem.. 9, 1923. c. vv. ROBERTSON.

vCREEP JACK.

FILED JAN. 20, 1922.

Witnesses if illpplicaton tiled Il'annary 2U, i922. :Ferial No. tjl.

To all fw )tom it may concern "lie it `known that Ll. Charms "Wj ltornamen,` a citizenofthe United States, residinfr at Philadelphia, `in the county of Phila delphia. and State of Pennsylvania, haveinvented certain new and useful improvementsin Creep Jacks,` of which the followinp; is a speciiication. lhisinventionrelates toa creep jack and more particularly toa novel and improved rolling stock device whereby arailr ad car for instance7 may be moved along; the track Vby hand or motor power.

` The 'primary object of the invention resides in the construction of a jack which may be positioned beneath and at one side of a disabled car in suchmanner that the car may be slightly `raised from the truck and b v applying manual or motor power the said car may be moved frontward or backward to the desired position by the operator.

hnother and very l import-ant object of the invention is the construction of a creep jaclrof the type above set forth which is applicable for use in connection with various types of railway cars and rolling stoclr in general, permitting" the jack to be placed beneatha car coupler or other suitable po- 3o, sition with respect to the frame andbody of the car so that the same may be slightly raised, including a novel and improved gearing; and operating mechanism for the jaclr which enables the same to move the car and also act as a brake when the car is being moved on an incline or grade.

i l attain the above objects and others by the accompanying drawing, wherein,

Figure l is a side view partly in section.

Figure 2 is an end view showing; the ap plieation of a motor to the operatingf mechanism, and

Fipure 3 is a view taken on the line 8-3 i of Figurel..

Referring now to the drawings, wherein like reference characters designate correspending parte throughout the several views, 5 designates the' frame or body of the jack, 6 the front and rear axles and l the 5o flanged wheels which are adapted to ride `on the tracks 8 as clearly disclosed by F ig ures l and 2 of the drawings. Rising centhe body of the car.

trally of the frame 5 there is provided a column 9 of substantial diameten the upper endof said column` beingiV threaded as shown at l0 to receive the internally threadede vertically movable2 rotataliile collar ll. the same beingprovided with apertures 112 radially disposed to permit of its rotation and vertical adjustment with respect to The center rotatable member ll is adapted to bear against the stationary member or body' engaging; member i3 which provided with a vertical flange lelwhereby said stationary member may be positioned with respect to the body of the car and retained by the threaded screw l5 in position when the rotatable member ll is actuated in raising; the car slightly from its seat. ln other words, by positioning' the jack beneath the car body and transferrinp,- the weight from its wheels lto the wheels 7 of the `iaclr, the car may be moved backward and forward by the geen ing and operating mechanism now to be described in detail,

l transversely extending;` shaft 16 operable in suitable bearings on the frame 5 is provided at one end with a spoke crank 17 whereby the saidshaft may be rotated and with a worm gear 18 at its opposite end the latter gear being in constant mesh with gear 19 rotatable on a short longitudinally extending stub shaft 2() which is rotatable in a bearing;- 2l on the outer side of the column 9 above referred to. The opposite end of the stub shaft 2()` is also provided with a worm gear 22 engaging a spur gear 23 of a. second horizontal shaft 241 parallel with the shaft 1b above referred to. rlifhe shaft 24tis also operable in bearings 25 on the frame 5 and carries at its outer end a sprocket wheel 26. Il sprocket wheel 27 ro tatable with the axle e is provided with the sprocket chain 28 chained over the first mentioned sprocket 26 for communicating' power to the said arde and consequently moving the jack as desired.

Referring to Figure 2 it will be observed that l have provided a motor designated in its entirety by numeral 30 mounted on the bracket 31 of the frame so that power may be communicated to the shaft ld in dependently of the spolre crank and thus permit of the operation of the jack with greater speed. In the operation of the jack as above set iorth it will be seen that when the same is positioned beneath a bumper, for instance, of a railway car and the stationary member 13 secured by the screw l5, by simply inserting a bar in any of the apertures 112 the collar 13 may be actuated so that the same will bear upwardly on the member i3 and raise the car from its truck slightly. As the ear is raised the weight thereoiu will be removed from its wheels and transferred to the wheels T of the creep jack so that when the operating,` mechanism is actuated manually or by power the car may be moved either forwardly or rearwardly as desired. It will thus be seen that the shat't also acts in the nature or a braking mechanism due to the arrangement of the gearngs so that on agrade the movement of the ear can be checked and the operator may control the same at all times either by the motor or by spoke crank.

In the accompanying drawings, l have illustrated my invention embodied in one form by way ot example, and which construction has been 'found to answer to a satisfactory degree the results to be obtained. lt would be manifest, however, that other forms of embodiment may be adopted, and that the construction may be variously changed and modified by the skilled mechanic without departing trom the limits of the invention; Further it will be understood that the invention is not limited to any particular form of construction in the parts. except in so far as such limitations are specified in the subject matter being claimed.

Having thus described my invention what l claim new and desire to secure by AUnited States Letters Patent is:

1. A creep jack ci? the class described comprising a wheel supported iframe, a column risingT trom the frame and threaded at its upper end, a 'vertically adjustable collar on the threaded portion ot the column for raising a car body, and gearing for operating the wheel supported JIranie.

2. creep jack' oi? the class described comprising a wheel supported frame. supporting;l axles for said iframe, a column risinrf centrally from the frame and threaded at its upper end. a manually adjustable co]- lar on the threaded portion ot the column, a stationary car body engaging member above the collar Vwhereby the said body may be. raised and gearing cooperatingr with one ot the supporting,r axles for propelling the wheel supported frame.

A creep jack ot the class described coi` prisiig a wheel supported frame, supporting arzles `tor the frame, rotatable means mounted centrally of the trame for raising;r

car body. pair ot horizontal shafts rotatable in bearings on said frame, a longitudinal stub shaft and meshed gears between the horizontal shafts. Sprocket and chain fearing between one ot the horizontal shafts and one of the supporting axles and means for aetmiting,r said shafts and A:rearingr to propel the ack.

In testimony whereof I ailix my signature in presence ot two witnesses.

CHARLES W. ROBERTSON. IW.,

LAS

s-l Titnesses Josnen; F. nsnNnAoH,

Cmmrnmn BUTLER. 

